for 75 find both recursive and explicit formula

Exercises #73-79 on page 138 in textbook Recursive formula (rect relation Answer for the sequence x defined by x1 = 2, In = 3 + Xn-1, n 2 2. 73) Find 75) Find a formula for the sequence c de- 3 fined by E xi. 2+ 5+ 8 = 15 n Xn $ 3 (n- 1)+ i=1 i= 1 74) Find 76) Is x increasing? yes 10 Ci. 2 + 5 + 8 + 11 + 14+ 77) Is x decreasing? No i=1 17 + 23+ 26 + 29 5 78) Is x nonincreasing? NO 155 79) Is x nondecreasing? Yes